4.7 Article

Porcine circovirus type 2 exploits cap to inhibit PKR activation through interaction with Hsp40

期刊

VETERINARY MICROBIOLOGY
卷 252, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.vetmic.2020.108929

关键词

PCV2; PKR signaling pathway; Cap; DNAJC7; P58(IPK)

资金

  1. National Natural Sciences Foundation of China (NSFC) [31860708]
  2. Natural Science Foundation of Guangxi Province [2017GXNSFBA198025]

向作者/读者索取更多资源

PCV2 infection inhibits PKR activation through interaction with DNAJC7, helping to understand the immune escape mechanism after PCV2 infection.
Porcine circovirus type 2 is the main pathogen of porcine circovirus disease, which has caused enormous economic losses to the pig industry worldwide. The PKR signaling pathway is important for the cellular antiviral response, but its role in the process of PCV2 infection is unknown. In this study, we first found that dsRNA was produced and that PKR was activated in PCV2 infection. However, interestingly, the activation of PKR was inhibited when the Cap protein was exogenously expressed in PAMs, and this inhibition was reversed by the expression of DNAJC7. The interaction between Cap and DNAJC7 was confirmed by laser confocal microscopy, coimmunoprecipitation and GST pull-down, and it was found that PCV2 infection or the expression of Cap protein could induce DNAJC7 to migrate to the nucleus and release P58(IPK), an inhibitor of PKR activation. Downregulating the expression of DNAJC7 by a specific inhibitor or recombinant lentivirus-mediated shRNA, inhibited the replication of the PCV2 genome and the production of virions, which was consistent with the increase of DNAJC7 expression in multiple tissues of weaned piglets infected with PCV2. These data indicate that although PKR was activated by PCV2 infection, the activation was inhibited by Cap through an interaction with DNAJC7. These results help to understand the molecular mechanism of immune escape after PCV2 infection.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据